Well they could do that, but again it means that the many months that they have spent designing the box will be useless. Like diet said, it takes many months to make a pony and have it to the shops.
Also, if a consignment of ponies is sent via ship to the store it takes many months, so if any new ponies are going to be out this month they are already liable to be in transit, of which it is too late to do anything about. The same goes for any promo material that is displayed in stores.
The short term fix would be to put a sticker on the box, for employees to stick on in the storeroom of a store before displaying them to the public, but that would mean lots of money spent. Since it would be thousands of dollars spent doing that, they would be more than likely want to print it in China, where it is cheaper than the USA, which again, takes months.
It's a nice thought, but Hasbro are after money and are more than likely thinking about the increased profit months down the line (because new toys have to be bought) rather than a short term gesture. I very much doubt that Hasbro being a corporate giant will actually do something to benefit the hurricane victims. Plus the fact is that last quarter they made a loss, donating to charity will further increase the loss, which is something they wish to avoid.
